Thanks. I am just wondering what would be required for interfacing with the Apex module. The board that elFloyd referenced earlier is said to be working, but that is a 0-10V interface.
As long as it's analog (not familiar with Apex) it should work. You would need to limit it to 0-5v in your code. Either that or use the RA adapter if you can. I think Roboerto put some extra gizmuchies (non-technical term for electronic parts/pieces) in the harness to cut the feed in half. I believe the harness will work for either PWM or analog feed too. Best to check the thread over on the RA forums to be sure though.
~Charlie